You must install a Subversion client to get and update the Fdo source code. To browse the list of available clients, click the Developer tools link at the bottom of the https://www.osgeo.org page. Pick a client and follow the instructions there to obtain and install the client. The instructions in this document are based on the use of the SVN command-line client.
For the purpose of this document, the following RPMs from http://the.earth.li/pub/subversion/summersoft.fay.ar.us/pub/subversion/latest/rhel-3/bin/ were installed.